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arXiv · 1801.04786

Electronic scattering, focusing, and resonance by a spherical barrier in Weyl semimetals

Ming Lu·Xiao-Xiao Zhang
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Abstract

We solve the Weyl electron scattered by a spherical step potential barrier. Tuning the incident energy and the potential radius, one can enter both quasiclassical and quantum regimes. Transport features related to far-field currents and integrated cross sections are studied to reveal the preferred forward scattering. In the quasiclassical regime, a strong focusing effect along the incident spherical axis is found in addition to optical caustic patterns. In the quantum regime, at energies of successive angular momentum resonances, a polar aggregation of electron density is found inside the potential. The findings will be useful in transport studies and electronic lens applications in Weyl systems.

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Ming Lu, Xiao-Xiao Zhang. 2018-01-15. Electronic scattering, focusing, and resonance by a spherical barrier in Weyl semimetals. https://doi.org/10.1088/1361-648x/aabbbb

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